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170b9caf33
1. interrupt/signal handlers can not have parameters 2. interrupt/signal handlers must be 'void' type
79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
//===------ SemaMSP430.cpp ----- MSP430 target-specific routines ----------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements semantic analysis functions specific to NVPTX.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Sema/SemaMSP430.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Attr.h"
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#include "clang/AST/DeclBase.h"
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#include "clang/Basic/DiagnosticSema.h"
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#include "clang/Sema/Attr.h"
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#include "clang/Sema/ParsedAttr.h"
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namespace clang {
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SemaMSP430::SemaMSP430(Sema &S) : SemaBase(S) {}
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void SemaMSP430::handleInterruptAttr(Decl *D, const ParsedAttr &AL) {
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// MSP430 'interrupt' attribute is applied to
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// a function with no parameters and void return type.
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if (!isFuncOrMethodForAttrSubject(D)) {
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Diag(D->getLocation(), diag::warn_attribute_wrong_decl_type)
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<< AL << AL.isRegularKeywordAttribute() << ExpectedFunctionOrMethod;
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return;
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}
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if (hasFunctionProto(D) && getFunctionOrMethodNumParams(D) != 0) {
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Diag(D->getLocation(), diag::warn_interrupt_signal_attribute_invalid)
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<< /*MSP430*/ 1 << /*interrupt*/ 0 << 0;
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return;
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}
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if (!getFunctionOrMethodResultType(D)->isVoidType()) {
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Diag(D->getLocation(), diag::warn_interrupt_signal_attribute_invalid)
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<< /*MSP430*/ 1 << /*interrupt*/ 0 << 1;
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return;
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}
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// The attribute takes one integer argument.
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if (!AL.checkExactlyNumArgs(SemaRef, 1))
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return;
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if (!AL.isArgExpr(0)) {
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Diag(AL.getLoc(), diag::err_attribute_argument_type)
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<< AL << AANT_ArgumentIntegerConstant;
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return;
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}
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Expr *NumParamsExpr = static_cast<Expr *>(AL.getArgAsExpr(0));
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std::optional<llvm::APSInt> NumParams = llvm::APSInt(32);
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if (!(NumParams = NumParamsExpr->getIntegerConstantExpr(getASTContext()))) {
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Diag(AL.getLoc(), diag::err_attribute_argument_type)
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<< AL << AANT_ArgumentIntegerConstant
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<< NumParamsExpr->getSourceRange();
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return;
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}
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// The argument should be in range 0..63.
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unsigned Num = NumParams->getLimitedValue(255);
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if (Num > 63) {
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Diag(AL.getLoc(), diag::err_attribute_argument_out_of_bounds)
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<< AL << (int)NumParams->getSExtValue()
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<< NumParamsExpr->getSourceRange();
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return;
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}
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D->addAttr(::new (getASTContext())
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MSP430InterruptAttr(getASTContext(), AL, Num));
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D->addAttr(UsedAttr::CreateImplicit(getASTContext()));
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}
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} // namespace clang
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